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Memory module installation rules

Memory modules must be installed in a specific order based on the memory configuration that you implement on your server.

Your server has 24 memory module slots. It supports up to 12 memory modules when one processor is installed, and up to 24 memory modules when two processors are installed. It has the following features:

For Intel Xeon Skylake processors or Jintide processors:

  • Supporting memory module type is as follows:
    • TruDDR4 2666, single-rank or dual-rank, 8 GB/16 GB/32 GB RDIMM

    • TruDDR4 2666, quad-rank, 64 GB LRDIMM

    • TruDDR4 2666, octa-rank, 128 GB 3DS RDIMM

  • The minimum system memory is 8 GB (only one processor installed and only one 8 GB RDIMM installed in the Processor 1 memory module 5 slot).

  • The maximum system memory is as follows:
    • 768 GB using RDIMMs (two processors installed and one 32 GB RDIMM installed in each of the 24 memory module slots)

    • 1.5 TB using LRDIMMs (two processors installed and one 64 GB LRDIMM installed in each of the 24 memory module slots)

    • 3 TB using 3DS RDIMMs (two processors installed and one 128 GB 3DS RDIMM installed in each of the 24 memory module slots)

For Intel Xeon Cascade Lake processors:

  • Supporting memory module type is as follows:
    • TruDDR4 2666, single-rank or dual-rank, 16 GB/32 GB RDIMM

    • TruDDR4 2933, single-rank or dual-rank, 8 GB/16 GB/32 GB/64 GB RDIMM

    • TruDDR4 2666, quad-rank, 64 GB 3DS RDIMM

    • TruDDR4 2933, quad-rank, 128 GB 3DS RDIMM

    • 128 GB/256 GB/512 GB DCPMM

  • The minimum system memory is 8 GB (only one processor installed and only one 8 GB RDIMM installed in the Processor 1 memory module 5 slot).

  • The maximum system memory is as follows:
    • 1.5 TB using RDIMMs (two processors installed and one 32 GB RDIMM installed in each of the 24 memory module slots)

    • 3 TB using 3DS RDIMMs (two processors installed and one 128 GB 3DS RDIMM installed in each of the 24 memory module slots)

    • 6 TB using Intel Optane™ DC Persistent Memory (DCPMMs) and 3DS RDIMMs in Memory Mode (two processors installed, and one 512 GB DCPMM installed in each of the 24 memory module slots)

For a list of supported memory module options, see:Lenovo ServerProven website